@doron
If looking just from the feature point of view WP vs Symbian, WP lacks quite many of the most liked features in a Nokia phone, which makes a "dump phone" from Nokia has features which Lumia lacks and in German media they recommended people to go to Austria and buy a N9 instead of a Lumia (N9 was never sold in Germany).
Of course the sales will suffer if you introduce an inferior product than you had before, and if you can't talk nicely with carriers (Microsoft has a bad reputation, worse than Apple among the carriers), then the carriers will not promote your product, and if you also are involved in a product which makes the carriers loose money, then they will be even more against your product.
Microsoft entered the mobile phone market long time before Apple, they had a time with 12% market share, but products been less desired than Symbian, and before the Nokias Lumia, the market share has fallen down to 2.2%, sure being up at 2.4% must feel good for Microsoft , but for each day Nokia is on this track, it costs them 11 million Euro per day and having all the eggs in one basket, had Mr Elop had any brains, he would have kept MeeGo and sold the N9 world wide and seen to have the N950 also mass manufactured, he should have kept Meltami for the development countries and he should NEVER written that memo of his (the memo caused the Elop effect and is the worst thing a CEO can do). Spreading out the risks, you will not get big losses and it gives you the chance to move away from heavy loss markets like the WP.
Steven Wozniak was comparing Android and WP, his favourite cellphone is still is the iPhone and he seems to like the N9 design, which the Lumia 800 and 900 are just ripoffs, keep in mind that the 800 isn't a real Nokia, but made by Compal branded as Nokia and has a lot of technical problems.
Microsoft may have time to "bleed", as they don't have to spend real money, it's Nokia who is bleeding and they will not be alive for long if they bleed in this way. The only one who gained of this is Microsoft, they got 0.2% more in market share and they got the right to use all Nokia patents. Nokia is bleeding a lot cause they sell their phones under the production cost, there will be no way to make profit on those WP units, not even if they didn't have to pay those US$20 for each manufactured unit.
Nokia had the most loyal user base of all the mobile brands, until Lumia, old customers are now switching to other brands like Samsung, who has been a good copy cat, who did make WP but is phasing it away as there is no profit and no user really wanting those phones, they did take the remnants of MeeGo and renamed it to Tizen and will not take too long to see Tizen units from Samsung. I bet you will see those become more popular than the WP.
And Samsung may even buy Nokia, just to get a thorn into Apples side, so that Apple will be paying Samsung royalty for each iPhone.